改进式晶闸管电容无功补偿方法的研究  

A Study about Method for improved Capacitor Reactive Power Compensation by Adjusting Voltage with Thyristors

作　　者：王建元[1] 马雪珂 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2015年第1期37-41,共5页Journal of Northeast Electric Power University

摘　　要：提出了一种通过晶闸管开关装置直接调节电容器两端电压以调节电容无功功率的方法及原理和接线。对换级时和故障情况下发生的断态过电压产生的过程提出理论分析。同时采用MATLAB/Simulink对此过程仿真分析,通过采用氧化锌压敏电阻过压保护后,重新对断态过电压进行仿真。结果表明:换级时断态过电压不高,在允许范围之内;装置故障时,会出现严重过电压,若过压保护动作后,可使断态电压降低到允许范围内。A method for reactive compensation by using thyristor switching device to change the capacitor volt-age directly and the wiring of the principle are proposed. State of off-state over-voltage is analyzed under fault. States of off-state over-voltage is analyzed theoretically under different device workingconditions, such as tap change and faults. Simulation results with MATLAB/Simulink software are presented for typical working condi-tions. For fault condition,the simulation is redone with ZnO varistor over-voltage protection being adopted. Re-sults show that tthe off-state over-voltage of thyristor is not high for normal operations,such as tap change,but when there is fault in the device,serious off-state over-voltage will occur. If the over-voltage protection acted, the off-state over-voltage is not high.

关 键 词：变压式电容无功补偿 晶闸管开关装置 换级调节 断态过电压 压敏电阻 

分 类 号：TM733[电气工程—电力系统及自动化]